.item{
  position: relative;
  .top{
    position: absolute;
    top: 0;
    left: 0;
  }
  .bottom{
    position: absolute;
    bottom: 0;
    left: 0;
  }
  .center{
    position: absolute;
    top:50%;
  }
}
.item-overlay{
  display: none;
  position: absolute;
  top: 0;
  right: 0;
  bottom: 0;
  left: 0;
  &.active,
  .item:hover & {
    display: block;
  }
}

.geetest {
  display: none;
  position: fixed;
  left: 0;
  top: 0;
  width: 100%;
  height: 100%;
  z-index: 3;
}

.bgGeet {
  position: absolute;
  left: 0;
  top: 0;
  width: 100%;
  height: 100%;
  background-color: #000;
  opacity: 0.7;
  z-index: -1;
}

.wrap {
  width: 300px;
  margin: 0 auto;
  text-align: center;
  background-color: #fff;
  position: relative;
}

.gt_wrapper {
  margin: 270px auto;
  width: 320px;
}